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arXiv · 1309.7351

Neutralino Dark Matter with Light Staus

Aaron Pierce·Nausheen R. Shah·Katherine Freese
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Abstract

In spite of rapid experimental progress, windows for light superparticles remain. One possibility is a ~100 GeV tau slepton whose t-channel exchange can give the correct thermal relic abundance for a relatively light neutralino. We pedagogically review how this region arises and identify two distinct scenarios that will be tested soon on multiple fronts. In the first, the neutralino has a significant down-type higgsino fraction and relatively large rates at direct detection experiments are expected. In the second, there is large mixing between two relatively light staus, which could lead to a significant excess in the Higgs boson branching ratio to photons. In addition, electroweak superpartners are sufficiently light that direct searches should be effective.

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Aaron Pierce, Nausheen R. Shah, Katherine Freese. 2013-10-13. Neutralino Dark Matter with Light Staus. https://arxiv.org/abs/1309.7351

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